To begin with, you'll need to install File Services for Macintosh on
your Windows 2000 servers. You can do this using the Add/Remove Control
Panel under additional Windows components.
A search in your server's Help system found in the Start menu should
lead you through the instructions.
Mac OS 9 machines populate the chooser exclusively with information from the
Appletalk network. If the machine is multi-homed be sure that Appletalk is
set to accept inbound connections on the same network segment as the Macs so
that it shows up in the chooser.